This essay, which bears no title page, was published in 1965 as a keepsake in conjunction with a talk given by Middleton to the School of Library Service of the University of California at Los Angeles. It documents the punchcutting practices primarily of Victor Hammer.
This work was published in the US without copyright notice
at a time when such notice was required to secure copyright.
It therefore passed into the public domain upon initial publication.
This digital reprint remains in the public domain.